/* 添加以下CSS样式 */
.login-bg, .register-bg {
    background: url('https://images.unsplash.com/photo-1510915361894-db8b60106cb1') no-repeat center center fixed;
    background-size: cover;
    min-height: 100vh;
}

.login-container, .register-container {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}